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Effects of aerobic training intensity on resting, exercise and post-exercise blood pressure, heart rate and heart-rate variability
Journal of Human Hypertension, 06/29/09

Cornelissen VA et al. – In older pts, both training programs exert similar effects on systolic blood pressure (SBP) at rest, during exercise and during post-exercise recovery, whereas the effects on heart rate (HR) are more pronounced after higher intensity training.

Methods

Study of the effects of endurance training intensity on 2 points
1) on SBP and HR at rest before exercise, and during and after a maximal exercise test
2) on measures of HR variability at rest before exercise and during recovery from exercise test
Subjects: healthy sedentary men and women age ≥55 yr
Randomization crossover study: three 10-wk periods
Periods 1 and 3: pts exercised at lower or higher intensity (33% or 66% of HR reserve) in random order, with a sedentary period in between
Training programs identical except for intensity; performed under supervision 3x for 1 hr per wk

Results

Endurance training at lower and higher intensity reduced SBP significantly and similarly for all 3 conditions (at rest before exercise, during exercise, and during recovery
SBP during recovery not lower than at rest before exercise
Chronic endurance training did not affect SBP response after acute exercise
Effect of training on HR at rest, during exercise and recovery more pronounced with higher intensity
Endurance training had no significant effect on sympathovagal balance

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